KNOXVILLE WSO AIRPORT, TENNESSEE

Period of Record General Climate Summary - Growing Degree Days

From Year=1910 To Year=2012
Station:(404950) KNOXVILLE WSO AIRPORT
Averages Daily Extremes
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 117 145 331 576 847 1050 1180 1155 950 624 288 131 7394
40 S 117 262 593 1169 2016 3066 4246 5401 6351 6975 7262 7394 7394
45 M 59 76 213 430 692 900 1025 1000 800 471 175 66 5908
45 S 59 135 348 778 1470 2370 3395 4395 5195 5667 5842 5908 5908
50 M 26 35 122 295 538 750 870 845 651 326 92 29 4577
50 S 26 60 182 477 1015 1765 2635 3480 4130 4456 4548 4577 4577
55 M 9 12 59 180 387 600 715 690 501 200 40 10 3402
55 S 9 21 80 260 647 1247 1962 2652 3153 3352 3392 3402 3402
60 M 2 3 22 91 247 450 560 535 355 101 12 2 2380
60 S 2 5 27 118 365 815 1376 1910 2265 2366 2378 2380 2380
Corn Growing Degree Days
50 M 61 82 194 348 546 719 821 802 636 380 164 68 4819
50 S 61 143 337 684 1230 1949 2770 3572 4208 4588 4751 4819 4819
Derived form the 1910-2012 Data
M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on May 22,
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Southeast Regional Climate Center, SERCC Webmaster